The OP only said Itachi can't regenerate in Edo state....so, i don't see why you want the need to make this things up.
And Edo Tensei Chakra ca never drain....there is why it was stated to have infinite chakra
- So, what does the edo have more than the regeneration?
- Oh really?
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Minato said he has no more chakra
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The Mizukage was in a sorry state
Mu as well couldn't use his jinton
Tobirama & Hashi talked about that when they tried to use clones with the barrier.
So did Zabuza told that to Haku, and Sasuke to itachi...etc
if they have the same chakra as the god Tree (endless chakra) they wouldn't have problems. The chakra just renew fast somehow.Also, Kabuto said Madara's edo is special, so even IF that was the case in his edo, that does not mean it's the
same for all other.
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Anyway, I only said my opinion, you don't have to agree with me. :ilu: